Hi John,
As you are in UK too, you need to buy through premier EDA, who are the exclusive distributor for UK. Their prices include support services above and beyond what Altium directly offers.
If you are a startup or new company ask about Altiums startup program, this gets you a full licence for Altium designer and support subscription for 1 year for just under £2k, with the option of paying the remainder to get a permanent seat at the end of the year. Its a good way to spread the cost out.
Criteria are as follows:
• Officially registered company, not older than 3 years
• Max. annual revenue of 500.000 Euro
• Max. 15 employees
• Independent company, not a subsidiary of an existing company